SkinniPopcorn.com, introduced last week by the British interactive design company called magneticNorth, bills itself as “the world’s first social media movie buzz barometer.” Go to the site, click on the “now showing” button, and see an unedited, unfiltered stream of Twitter commentary.

It is a twist on sites like Rotten Tomatoes and Metacritic, which aggregate film reviews. Skinni Popcorn amasses tweets instead. The site focuses on mainstream Hollywood releases.

“Combing through reviews is such a pain,” said Brendan Dawes, the company’s creative director. “We wanted gut commentary, a very quick snapshot. Is it worth seeing or not?”

Not that Mr. Dawes has no use for critics. The site lacks many bells and whistles — no search function or option to buy tickets — but it does include links to reviews published by The New York Times. “Some people do want a little more heft,” he said.

There is no business or editorial affiliation between the two companies.

What’s in it for magneticNorth? The company, whose clients include Kellogg’s and the British Broadcasting Corporation, primarily wants to use the site as an ad — an example of the kind of digital product it can serve up. If Skinni Popcorn (named for the slang expression “get the skinny”) takes off, the company could also seek a buyer or partner.